THE UNDERGROUND FORM OF FLOOR OF GANGETIO TROUGH. 87 

 Table 26. — Latitude Stations in and south of the Dehra Dun. 





Approximate dis- 









tance from main 



Deflections due to 





Station . 



boundary and 

 outer edce of 



Imaginary Range, 

 Siwaliks and 



Observed deflec 

 tions. 





iSiwij 



iliks. 



Trough. 









1 II 





Raj pur .... 



& 5 



19 



— 43 — 42 



— 44 



Dehra Dun, old 



1 & 6 



14 



— 33 — 36 



— 33 



Dchra Dun, new 



2 & 7 



13 



— 35 — 33 



— 33 



Dehra Dun, E. Base. 



10 



9 



— 25 — 26 



— 26 



Shorpur .... 



12 



: 5 



— 23 — 27 



— 25 



Khajnaur 



13 



: 6 



— 24 — 26 



— 23 



Lachkua 



13 



: 2 



— 24 — 27 



— 25 



Bullawala 



14 



: 1 



— 24 — 27 



— 25 



Anisot .... 



15 



: 5 



— 24 — 25 



— 25 



Hatni .... 



16 



: 3 



— 23 — 26 



— 26 



Sarkara .... 



32 



20 



— 10 — 10 



— 8 



Nojli .... 



38 



: 22 



— 8 — 7 



— 10 



distance from the main boundary, this being due to the fact that, 

 immediately east of Raj pur, the general course of this boundary is 

 interrupted and thrown southwards for a distance of about five miles, 

 the exact distance being indeterminable as the boundary is covered 

 over with recent or sub-recent gravels. As a consequence of this, a 

 single value cannot be given for the distance from the main boundary 

 of the stations close to this change in its course ; Rajpur, for instance, 

 is a station on the main boundary, so far as the hills to the west- 

 wards are concerned, but lies about five miles north of the main 

 boundary so far as it is affected by those to the eastwards. 



In the last column of the table is given the observed deflection 

 at each station, and in these it will be noticed that from the Dehra 

 Dun E. Base to Hatni they give practically identical deflections, 

 in spite of the increasing distance from the edge of the main range ; 

 the only exception is the station of Khajnaur, at which the northerly 

 deflection is in slight defect, as compared with the other stations, a 

 defect doubtless due to the position of the station on the northern slope 

 of the Siwalik Range, where it is subject to a purely local southerly 

 attraction which would easily account for the small defect in the 

 northerly deflection. Form this uniformity in the deflections over 

 so broad a strip it is evident that there is some cause at work, 

 counteracting the decrease in deflection which would otherwise 



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